package chap1;

/**
 * @author oldliu
 * @since 1.0
 */
public class IntTest {
    public static void main(String[] args) {
        //int的范围为-2147483648~+2147483647
        //下面这一行有错误，超过了21亿
        //int m=10000000000000000000000000;
        String s="你好";
        System.out.println(s);
        final double PI=3.14;
        System.out.println("圆周率是"+PI);
        //PI=100.5;
        s="good morning";
        System.out.println(s);
    }
}
